Two field experiments were conducted at the experimental Farm Station of Hort. Faculty of Agriculture Moshtohor, Benha University, Qalubia Governorate, Egypt, during the seasons of 2022 and 2023 This study aimed to investigate the effect of foliar spray with some growth activators i.e., benzyladenine at 25 and 50 mg L-1, milagrow at 50 and 100 mg L-1, yeast extract at 50 and100 ml L-1 as well as lithovit at 250 and 500 mg L-1 on growth, chemical composition, anatomical features as well as yield characteristics of common bean plant.
The obtained results indicated that, significant increases existed in many growth characteristics and bioconstituents level such as photosynthetic pigments, phytohormones, minerals, total carbohydrates as well as crude protein %. Also, results showed that applied treatments enhanced anatomical features of common bean plant. Moreover yeast extract at 100 ml L-1 and milagrow at 100 mg L-1 treatments caused significant increases in flowering and yield characteristics i.e., number of flowers plant-1, number of setted pods plant-1, pods yield plant-1, weight of seeds pod-1, 100 seeds weight, weight of seeds (g) plant-1 in the two growing seasons which were the most effective treatments in this respect compared with control and the other used treatments.
Generally, it could be recommended to spray common bean plants using growth stimulators such as yeast extract at 100 ml L-1 or milagrow at 100 mg L-1 to improve their growth, productivity and quality.